Question

How to generate N unique random numbers between min and max in C#

Answer 1

using System;
using System.Collections.Generic;

public class NenerateNUniqueRandomNumbersBetweenMinAndMax_CSharp
{
	public static ISet<int> generateUniqueRandomNumbers(int N, int min, int max) {
		ISet<int> uniqueNumbers = new HashSet<int>();
		Random random = new Random();

		while (uniqueNumbers.Count < N) {
			uniqueNumbers.Add(random.Next((max - min) + 1) + min);
		}

		return uniqueNumbers;
	}

	public static void Main(string[] args)
	{
		int N = 8; // Number of unique random numbers

		ISet<int> randomNumbers = generateUniqueRandomNumbers(N, 1, 20);

		foreach (int num in randomNumbers) {
			Console.Write(num + " ");
		}
	}
}



/*
run:
 
19 12 17 4 7 14 15 10 
 
*/

 

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